2150605 has 4 divisors (see below), whose sum is σ = 2580732. Its totient is φ = 1720480.

The previous prime is 2150597. The next prime is 2150639. The reversal of 2150605 is 5060512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1223236 + 927369 = 1106^2 + 963^2 .

It is not a de Polignac number, because 2150605 - 2³ = 2150597 is a prime.

It is a Duffinian number.

2150605 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215056 + ... + 215065.

It is an arithmetic number, because the mean of its divisors is an integer number (645183).

2^2150605 is an apocalyptic number.

It is an amenable number.

2150605 is a deficient number, since it is larger than the sum of its proper divisors (430127).

2150605 is an equidigital number, since it uses as much as digits as its factorization.

2150605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430126.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 2150605 is about 1466.4941186381. The cubic root of 2150605 is about 129.0783931498.

The spelling of 2150605 in words is "two million, one hundred fifty thousand, six hundred five".